Film-developing tank.



W. T. MILLER.

FILM DEVELOPING TANK.

. APILIOATION FILED JUNE 20, 1913. 1 091 81 I Patented Mar. 31, 1914.

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W. T. MILLER.

FILM DEVELOPING TANK.

APPLICATION FILED JUNE 20, 1913.

Patented Mar. 31, 1914.

2 SHEETS-SHEET 2.

Snow Vic's WRYNE T. MILLER COLUMIIA PLANOOIAPH Co.,WAsmNn'r0N, D. c

UNITED STATES PATENT OFFICE.

WAYNE T. MILLER, 0F ANGOLA, INDIANA, ASSIGNOR OF ONEHALF TO DON S.

IIAMLIN, OF ANGOLA, INDIANA,

FILM-DEVELOPING TANK.

Specification of Letters Patent.

Application filed June 20, 1913.

Serial No. 774,923.

Tanks, of which the following is a specification, reference being had to the accompanying drawings.

This invention relates to lmprovemen'ts 1n film develop-ing tanks, and an object thereof is the provision of a device of this character which will support various sizes and shapes of films which are to be developed.

A further object of this invention is the provision of a film developing tank, in which a plurality of films may be supported in eX- tended position, so that the films will not come into contact with each other or with; the tank, thereby preventing them from be;

coming scratched or otherwise injured.

Vith these and other objects in View, this;

invention consists in the novel construct-ion,

combination and arrangement of parts, to be:

hereinafter more fully described, claimed and illustrated in the accompanying drawings, in which Figure 1 is a longitudinal section of the device; Fig. 2 is a top plan view thereof with the cover partly open; Fig. 8 is a vertical section; Fig. 4 is a fragmentary perspective view of one of the side walls of the tank; Fig. 5 is a fragmentary detail View; Fig. 6 is a perspective view of a portion of one of the clamping rods; and Fig. 7 is a transverse section of one of the clamping rods. Referring more particularly to the drawings, the numeral 5 designates the bottom of the tank, 6 the side walls thereof, and 7 and 8 the end walls. Connected to the upper edges of the side walls on their inner faces are longitudinal bars 9, each of the bars being provided at one end with a recess 10, and having in their opposite ends a series of spaced notches 11, the recesses 10 and the notches 11 in the bars 9 being arranged in transverse alinement. Transversely extending supporting bars 12 and 12' are arranged in the tank, the bar 12 being adapted for engagement in the alined recesses 10, and the bar 12 being adapted for engagement at its opposite ends in any of the alined recesses 11 in the bars 9. The inner face of each supporting bar 12 is provided with a plurality of spring clasps 13, the clasps being adapted to receive the upper ends of clamping rods 14. Each of the clamping rods 14 comprises a pair of semi-cylindrical sections 15 which are hingedly connected together at their upper ends as at 16, one of the sections of each clamping rod being provided Patented Mar. 31,1914.

at its lower end with a clasp 17 which is" adapted to extend around the other section of the rod to hold the sections in closed position. The lower extremities of the sections 15 of the clamping rods 14 are tapered as at 18 for engagement in sockets 19 formed on the bottom 5 of the tank to maintain the rods in vertical position. The sockets 19 are arranged in rows, each row having the same number of sockets as the number of clamps 13 mounted upon the bars 12, the portion of the floor under the notched ends of the bars 9 being provided with the same number of rows of sockets, as the number of notches 11 in the bars. The portion of the floor under the recessed ends of the bars 9 The upper edges of the side walls 6 oflthe tank and the end wall 7 thereof are provided with longitudinal grooves 20 to receive the side edges of a slidable cover 21, the end wall 8 of the tank having the shoulder 22 on the outer face thereof near its upper edge to receive a depending flange 23 formed on one end of the cover 21, so that when the cover is applied to the top of the tank, the tank is tightly closed and the light is entirely shut out therefrom. The end wall 7 of the tank is provided adjacent its lower end with an opening 24, for the reception of the offset lower end 25 of an induction pipe 26 by means of which the developing liquid is troduced into the tank, the upper end of the pipe 26 being funnel-shaped as at 27. The upper end of a discharge pipe 28 is dis posed through the end wall 8 of the tank adjacent its upper end, the pipe 28 extending downwardly within the tank and terminating adjacent the bottom thereof. A flexible tube (not shown) may be connected to the projecting end of the pipe 28 whereby the developing liquid contained within the tank may be discharged therefrom by siphonic action. A short curved pipe 29- also projects through the wall 8 adjacent its upper end, for the purpose of allowing the air within the tank to escape when the same is being filled with developing liquid. If desired, a finger piece 30 may be formed upon the cover 21 so that the same may be readily applied to or removed from the tank.

' In the practical use of my device, the films 31 are disposed at their opposite ends between the sections of the clamping rods 14, the clamping rods being maintained in closed position by the clasps 17 at their lower ends. The lower ends of the clamping rods are then disposed within the sockets 19 in the bottom of the tank, and the upper ends of the rods are secured in the clasps 13 which are mounted upon the transversely extending supporting bars 12 and 12. The supporting bar 12 may be disposed at its opposite ends in any of the alined recessesll in the bars 9 depending upon the length of the films to be developed, whereupon the cover 21 is arranged in position to tightly close the tank and exclude the light therefrom. The foregoing operations are preferably performed in a dark room, and when the cover is in position upon the tank, the tank may be, if desired, conveyed to a lighted room, and the developing liquid may be poured into the tank through the induction pipe 26. When the developing of the films has been completed, the liquid may be drained from the tank through the pipe 28 by siphonic action, and the films may be removed.

From the above description taken in connection with the accompanying drawings, it will be seen that I have provided a film developing tank in which a plurality of films may be developed at the same time, and in which films of different widths and lengths may be supported in spaced relation with. each other.

What I claim is:

1. A device of the character described including a receptacle, bars disposed transversely of the receptacle adjacent its upper edges and supported thereby, clamping rods within the receptacle and disposed vertically thereof, and means carried by. the bars for detachably engaging the rods.

2. A receptacle, bars connected to the side walls of the receptacle adjacent their upper edges and being provided with alined notches, supporting bars mounted at their opposite ends in said notches, clasps carried by said supporting bars, and clamping rods engaged by said clasps, as and for the purpose described.

3. A receptacle, bars connected to the side walls of said tank adjacent their upper edges, one end of said bars having alined recesses therein, the opposite ends of said bars having alined notches formed therein, transversely extending supporting bars mounted at their opposite ends in said alined notches and recesses, clasps carried by said supporting bars, clamping rods having their upper ends in engagement with said clasps, and sockets mounted on the bottom of said receptacle for the reception of the lower ends of said clamping rods, as and for the purpose described.

1. A device of the character described comprising a receptacle, bars secured to the side walls of said receptacle adjacent their upper edges, each of said bars having a recess formed therein at one end, the recesses in said bars being in transverse alinement, each of said bars having spaced notches formed in its opposite end, said notches being in transverse alinement with each other, supporting bars mounted at their opposite ends in said recesses and in the alined notches, clasps carried by said supporting bars, sectional clamping rods connected to said clasps, means for holding the sections of said clamping rods together, and sockets mounted on the bottom of said receptacle, the lower end of said clamping rods being adapted for engagement in said sockets, as and for the purpose described.

In testimony whereof I hereunto aflix my signature in the presence of two witnesses.

VAYNE T. MILLER.

Vitnesses CHAS. 1-1. DUNN, C. E. VVORKENON.

copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. C. 

